What's the first few Alphas/#'s in your serial number? Perhaps you need an updated ejector/extractor. I'll check my armorer's manual.
In my .40 cal, produced in '95, I changed out my ejector due to an update. It is longer than the stock one it came with. Also needed to change extractor to a 90 degree/5 degree instead of the stk 90 degree/0 degree.